Add and subtract decimal values using base blocks. The problems difficulty is controlled by the user. Set the number of whole number columns up to 100s. Set the decimal places from 0 to 3 places. Other bases are available. Please take a few secon...ds to wait for this virtual manipulate (that uses a Java applet) to fully load. From Utah State University.[more]

Base Blocks Subtraction – Use base ten blocks to model separation of groups in subtraction. The user can adjust the problem difficulty by changes the number of digits that appear. Please take a few seconds to wait for this virtual manipulate (that us...es a Java applet) to fully load. From Utah State University.[more]

This is a virtual manipulative (that uses a Java applet). Illustrate addition and subtraction in a variety of bases. Please take a few seconds to wait for this virtual manipulate to fully load. From Utah State University

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